Bosh-plate.



No. 627,924] Patented June 27, I899. C. J. GUSTAFSON &. A. P. GAINES.

BUSH PLATE.

(Application filed June 10, 189B.)

2 Sheets-Sheet I.

(No Model.)

Wzinesses d6 5 @MWL I No. 627,924. Patented June 27, I899.

c. J. GUS-TAFSON & A. P. GAINES.

BosH PLATE.

(Application filed June 10, 1898.) (No Model.) 2 Sheets-Sheet 2.

any/"ma w 6 WW Wiinesses m: norms PETERS o0, mom-uma. vasnmomn, n. c.

of still another modified form.

NITED STATES "ATENT w CHARLES J. GUSTAFSON, OF SEQUACHEE, AND AMBROSEPORTER GAINES, OF SOUTH PITTSBURG, TENNESSEE.

BOSH-PLATE.

SPECIFICATION forming part of Letters Patent No. 627,924, dated June 27,189d.

Application filed June 10, 1898. Serial No. 683,101. (No model.)

To all whom it may concern/.-

Be it known that we, CHARLES J. GUSTAF- SON, residing at Sequachee, andAMBROSE PORTER GAINES, residing at South Pittsburg,

5 in the county of Marion and State of Tennessee, citizens of the UnitedStates, have invented certain new and useful Improvements inBosh-Plates, of which the following is a specification.

Our invention relates to improvements in bosh-plates for blast or otherfurnaces; and our object primarily is to provide a more perfectcirculation ofthe cooling liquid and to secure a more effective coolingof the bosh- Wall of the furnace than has hitherto been attainable inconstructions employed for'this purpose.

Our invention further consists in the novel construction hereinafterdescribed with ref-' erence to the accompanying drawings and moreparticularly pointed out in the claims.

In the drawings, Figure l is a vertical section of one side ofafurnace-wall on the line 2 2, Fig. 2, showing the application of our in-2 5 vention thereto. Fig. 2 is an elevation of half a furnace-wall fromground-line to mantle, showing our bosh-plates in position withcirculating-pipes removed. Fig. 3 is atrans verse sectional plan view ofa fourth part of 0 a furnace on lines 3 3, Fig. 1. Fig. at is acentralvertical section of one form of our boshplate. Fig. 5 is a similar viewof a modified form thereof. Fig. 6 is a similar view of another modifiedform. Fig. 7 is a similar view Fig. 8 is a transverse sectional view onthe line 8 8,

Fig. 6. Fig. 9 is a similar view on the line 9 9, Fig. 5. Fig. 10 is asimilar view on' the line 10 10, Fig. 4. Fig. 11 is a similar view of afurther modification. Fig. 12 is a front elevation of one form ofbosh-plate. Fig. 13 is a similar view of a modification. Fig. 14.

is a view of a modified arrangement of boshplates.

5 Referring to the drawings, in Which the same reference charactersdesignate the same or corresponding parts in all the views, the letter Aindicates the lower part of afurnace in which are placed the usualtwyer-open- 5o ings B and above which is the bosh-wall G.

Our bosh-plates consist, essentially, of a vertically-elongatedwater-tight chamber D, having an inlet-opening 3 at or nearit-s bottomand in the outer wall thereof and an outlet or discharge opening 4 insaid wall at or near the top, through which openings the cooling liquidcirculates and in a vertical direction from the bottom toward the top inthe bosh plate when the latter is in position in the furnace-wall. Wepreferably surround the bosh-wall of the furnace with a metal shell orjacket E,provided with horizontal strengthen-ing-bands F, which shell orjacket is provided with a number of vertically-elongated openings orholes corresponding to the boshplates, through which openings thelatter. may be readily inserted into and removed from the recesses inthe furnace-wall, into whichthe said bosh-plates are seated when inoperative position. The recesses have their longest dimensions extendingin a vertical direction and their internal walls terminating near theinnerface of the furnace-wall, and the bosh-plate has an outer contourconformingto the recess in which it is seated.

lVe preferably provide the outer wall of each bosh-plate'with awashout-opening 6, normally closed by a suitable plug and located nearthe inlet-opening 3, such washout being advantageous when the nature orcondition of the circulating liquid is such as to cause deposits orsediment to accumulate in the bottom of the plate. By this means suchsediment may be removed without disconnecting the circulating or inletand outlet pipes. The bosh-plates are arranged in horizontal courses, aseries of plates forming each course, and the platesin successivecourses form vertical columns, in which the several plates are connectedby circulating-pipes 12, the main 9o inlet-pipe 11 being connected tothe inlet-opening of the lowermost plate of the column and thedischarge-pipe 13 to the outlet-opening of the uppermost plate thereof.lVhen the diameter of the bosh varies, increasing from- 5 It will beseen that the plates are located in different horizontal planes and thatthe tops of the lower plates are connected with the bottoms of theplates above, so that the circulation of the cooling liquid is from thebottom upwardly through the series of plates in successive horizontalplanes, and this is the es sential feature of the arrangement in employing successive horizontal courses of plates, whether the connectedplates form a strictly Vertical column or one which extends in adiagonally vertical direction.

These bosh-plates are preferably cast of copper or bronze and may beunobstructed internally, as shown in Fig. 4, or they may be providedwith any suitable number of diaphragms or baffie-plates, as shown inFigs. 5 to 7, and they may vary in form of cross-section, width, depth,or thickness, without departing from the essential feature of ourinvention. When the furnace-wall is very thin, the plates may be reducedin thicknessthat is, in the direction of the diameter of the furnacewhen in position thereonand the inner wall concaved, as shown in Fig.11.

\Vhen the circulating liquid contains much solid matter, we prefer toprovide the boshplate with one or m oreinternal diaphragms orbaffle-plates so located as to form a settlingchamber and to contractthe circulating-channel withinthe bos'h-plate, thereby insuring asufficiently rapid circulation of the current at the internal face ofthe plate where the heat is most intense and therefore most important tosecure the best cooling effect. One form of this construction is shownin Fig. 5, where the numeral 5 indicates a baffle-plate or diaphragmextending from the outer wall of the bosh-plate above the inlet-opening3 toward the internal face thereof, thence upwardly, and terminatingslightly below the top of the bush-plate. This baffle-plate or diaphragmdivides the plate into two chambers 7 and 8. The former serves as thecirculating-channel for the current of liquid, while the latterconstitutes a settling-chamber for the sediment or solid matter which isprecipitated from the current as its direction is abruptly changed atthe top of the bosh-plate and passes over the end of the baffle-plate tothe dischargeopening 4, the body of water within the chamber 8 beingcomparatively quiet, so that the settling is facilitated. The sedimentgradually accumulates at the bottom of the chamber 8 and is readilyremoved through the wash out-opening 6.

When our bosh-plate is used in furnaces having thick walls and thicknessof the plate will admit, two or more of such bathe-plates maybe used,suchas shown in Figs. 6 and 7, where it will be seen that a baffle-plate9, depending from the top of the bosh-plate, is interposed between thebathe-plate 5 and the outer wall of the bosh-plate, thus forming acircuitous channel for the liquid in its passage from the inlet to thedischarge opening and affording better opportunity for settling. Thebaffle-plate 9 may be bent toward the outer wall of the bosh-plate, asshown at 10, Fig. 7, thereby enlarging the chamber for the reception ofthe sediment, where the conditions will admit of such formation.

In Fig. 12 the outer contour of the plate, conforming to the contour ofthe chamber, is shown as substantially rectangular with slightly-roundedcorners, while in Fig. 13 the top and bottom are formed on curved lines,and while either form may be used the latter is preferable because ofits greater strength and the less resistance offered to the passage ofthe cooling liquid through the plate and, further, because the excessiveaccumulation of sediment at the corners of the chamber is prevented.

Any of the forms of bosh-plates shown in the drawings and hereindescribed may be used in all the courses, if desired, or any two or moreof the modified forms may be used in the same wall, as shown in Fig. 1.In order to provide, however, for perfect interchangeability of theplates in all positions in the same furnace, only one of the variousmodifications disclosed would be used.

In order to obtain a more decided cooling effect at the lower positionsof the furnacewall just above the twyer-line where the heat ismostintense, the vertical distance between adjacent plates may beproportionately reduced between the lower courses and increased betweenthe upper courses, as shown in Fig. 14, without necessitating any changewhatever in the form of plate. In the majorityof furnaces, however, itis believed that in view of the lower temperature and higher pressure ofthe cooling liquid entering the lower courses as compared to thegraduallyrising temperature and decreasing pressure of the same liquidin the upper courses boshplates of uniform dimensions, uniform verticalspacing, and uniform design will effect the desired grad nated coolingeffect upon the furnace-wall, and in the usual form of furnace (shown inFig. 2) it will be observed that the arrangement of the plates invertical columns contributes to this effect, for with the same number ofplates in each course the horizontal spacing between adjacent plates iscloser at the bottom or lower courses than in the upper courses, thisdistance varying gradually as the diameter of the bosh-wall varies frombottom to top and approximately as the heat inside the furnace-wallvaries.

In addition to obtaining a more thorough and effective circulation forthe cooling fluid through the plates by the vertical arrangement ofDosh-plates we also obviate any tendency on the part of the furnace-wallto become burned out in horizontal cavities or recesses between adjacentlayers or courses of bosh-plates when laid horizontally, thus formingshelves, on which the descending stock frequently lodges, or forms ascaffold, to the great detriment both in quality and in quantity ofoutput, and often causing entire destruction of coolers and twyers. Bythe use of the use of our vertical bosh-plates a very slight uppersurface is subjected to the Weight of the masonry forming the bosh-Wall,which may thus be self-supporting independent of the Dosh-plates byforming continuous unbroken columns between adjacent columns ofbosh-plates from top to bottom and imposing practically none of itsweight upon any of the bosh-plates, which may therefore be easilywithdrawn and inserted without the least damage to the walls, and noarching of walls over plates is necessary. Again, a stronger and moreeffective air-tight construction of bosh-wall is facilitated by the useof our vertical bosh-plates, as they are especially well adapted for usein combination with an iron or steel shell or jacket havingcorresponding openings, through which the vertical plates may beinserted and an air-tight joint made with thissteel shell orjacket,which thus offers a safe and substantial support to the bosh-wall untilcompletely worn or burned out, and, finally, by the use of our platesthey may be put in any position in the same furnace or in any furnacewithout regard to the difference in diameters, as only one pattern isnecessary for furnaces of varying diameters or for different verticalpositions in the same furnace, whether the same enlarges in diameterfrom bottom to top or not. This interchangeability of the plates is ofgreat advantage when it becomes necessary to remove and replace anyplates in position either for repairs or for washing out.

We do not herein claim the broad feature of a series of bosh-plates eachwith its height so much greater than its width that no bridge, arch, ormodified construction of furnace-wall shall be required over thebosh-plate opening to support the superincu mbent masonry,.with

' means for introducing a cooling medium into said plates, because thissubject-matter is the sole invention of Charles J. Gustafson and isclaimed in an application for a patent filed by him May 26,1899, SerialNo. 718,438.

We claim as our invention- 1. The combination with a furnace having arecess in its Wall with its longest dimension. vertical and terminatingat or near the inner wall of the furnace, of a vertically-elongatedclosed box or chamber seated in said recess the front wall of the boxtoward the rear wall of the same and then upwardly, whereby a contractedpassage is formed between the vertical portion of the plate and the rearwall of the box, substantially as described.

2. The combination with a furnace having a recess in its Wall with itslongest dimension thereof in a vertical direction and terminating at ornear the inner face of said wall, of a bosh-plate consisting of avertically-elongated closed box or chamber, substantially conforming tothe shape of, and seated in, said recess, whereby the superposed furnacestructure is practically self-supportingand independent of thebosh-plate,said bosli-plate being provided with an inlet-opening nearthe bottom and an outlet-opening near the top, an inlet-pipe connectedto said inlet-opening and arranged to direct the incoming liquid againstthe inner wall of the box, and means for forcing water under pressurethrough said inlet-pipe, whereby the water is caused to pass upwardlyagainst the inner face of the box, substantially as described.

3. The combination with a furnace having a series of recesseslocated atdifferent heights in the furnace-wall thereof, of a series of boshplatesseated in said recesses, each of said plates consisting of a verticalelongated closed box or cham her, and 'each of said plates beingprovided with an inlet-opening at or near its lower end, and anoutlet-opening at or near its upper end, a circulating pipe or pipesconnecting the upper ends of the plates below to the lower ends of theplates above, and an inlet-pipe connecting the inleteopening'of thelower plate Witha source of water-s11 pply, said inlet-pipes of eachplate being arranged to discharge the cooling liquid directly againstthe inner wall of the plate, and means for forcing the liquid underpressure through the said inletpipes, whereby it is caused to circulatethrough the series of plates from the bottom upwardly and the incomingliquid in each plate is caused to pass upwardly against the internalwall of said plate, substantially as described. 7

4. The combination with a furnace, of a metal shell or jacket coveringthe external wall of the furnace and provided with a series ofvertically-elongated openings, a series of recesses in the furnace-wallregistering with.

said openings, and a series of vertically-elongated closed bosh-platesconforming substantially to the shape of said recesses, and havinginlets near their bottoms and outlets near their tops, said plates beingremovably inserted through the openings in the shell or jacket andseated in said recesses, and pipes too connecting the tops of the lowerplates with the bottoms of the plates above, said pipes being arrangedto discharge the liquid against the internal walls of the bosh-platesthrough pass upwardly through the series, substantially as described.

5. Thecombination with a furnace-wall the lowest pipe of the series sothat it will having a recess therein whose longest dimension extends ina vertical direction, and having a cross-section whose longest dimensionextends from the outer toward the inner face of the wall, of abosh-plate consisting of a closed box, or chamber, seated in, andconforming to the shape of, said recess, an inletpipe connected to thebottom of said plate, and an outlet near the top thereof, adeflecting-partition extending from the outer face of the bosh-plateabove the inlet and upwardly toward the top of said chamber, anddividing the bosh-plate into vertical chambers through the inner one ofwhich the liquid is caused to pass from the inlet upwardly againsttheinner wall and through the outlet, the outlet-chamber forming asettling-chamber for sediment, substantially as described.

6. The combination with a furnace-wall having a series ofvertically-elongated recesses therein located at different heights insaid wall, of a series of vertically-elongated bosh-plates located insaid recesses in differenthorizontal planes, each of said plates havingan inlet at the bottom and an outlet at the top, and a baffle-plateextending from the outer wall of the plate above the inlet and upwardlytoward the top of the plate forming a circulating-chamber on one side ofsaid partition adjacent to the internal wall of the plate and asettling-chamber on the other side of said partition, with pipesconnecting the tops of the lower plates with the bottoms of the platesabove, and means for introducing a cooling liquid under pressure throughthe bottom of the lowerplate, whereby a circulation of the coolingliquid upwardly through the series of plates is obtained.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

CHARLES J. GUSTAFSON. AMBROSE PORTER GAINES.

Witnesses as to C. J. Gustafson:

TILLIAM C. HILL, LoUIsE H. HILL.

Witnesses as to A. P. Gaines:

JAs. L. GAINES, XV. E. CARTER.

